3/8 I.D. x 1/2 O.D. - 3/8 ID PEX TUBE: Flexible, corrosion-resistant, no electrolysis, and freeze damage-resistant. QestPEX pipe can be connected to galvanized, copper, and CPVC systems with standard Qest fittings, including crimp and compression. QestPEX pipe meets or exceeds ASTM F-876 and F-877 standards. QestPEX pipe is easy-to-instal...